DataGridCommandEventArgs クラス
DataGrid コントロールの CancelCommand、DeleteCommand、EditCommand、ItemCommand、UpdateCommand の各イベントのデータを提供します。このクラスは継承できません。 名前空間: System.Web.UI.WebControls
アセンブリ: System.Web (system.web.dll 内)
構文
解説
使用例
.NET Framework のセキュリティ
継承階層
スレッド セーフ
プラットフォーム
バージョン情報
参照
アセンブリ: System.Web (system.web.dll 内)
構文解説CancelCommand イベントは、DataGrid コントロールの項目に対する [キャンセル] ボタンがクリックされたときに発生します。
DeleteCommand イベントは、DataGrid コントロールの項目に対する [削除] ボタンがクリックされたときに発生します。
EditCommand イベントは、DataGrid コントロールの項目に対する [編集] ボタンがクリックされたときに発生します。
ItemCommand イベントは、DataGrid コントロール内の項目で、ボタンがクリックされたときに発生します。これにより、特定のコマンド ボタンがクリックされたタイミングをプログラムによって判断し、適切なアクションを実行できます。このイベントは、通常 DataGrid コントロールのカスタム コマンド ボタンを処理するために使用します。
UpdateCommand イベントは、DataGrid コントロールの項目に対する [更新] ボタンがクリックされたときに発生します。
DataGridCommandEventArgs のインスタンスの初期プロパティ値の一覧については、DataGridCommandEventArgs コンストラクタのトピックを参照してください。
使用例EditCommand、CancelCommand、UpdateCommand の各イベントのイベント ハンドラを指定およびコード化して、DataGrid コントロール内の項目を編集する方法を次のコード例に示します。
<%@ Page Language="VB" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <html> <script runat="server"> ' The Cart and CartView objects temporarily store the data source ' for the DataGrid control while the page is being processed. Dim Cart As DataTable = New DataTable() Dim CartView As DataView Sub Page_Load(sender As Object, e As EventArgs) ' With a database, use an select query to retrieve the data. Because ' the data source in this example is an in-memory DataTable, retrieve ' the data from session state if it exists; otherwise create the data ' source. GetSource() ' The DataGrid control maintains state between posts to the server; ' it only needs to be bound to a data source the first time the page ' is loaded or when the data source is updated. If Not IsPostBack Then BindGrid() End If End Sub Sub ItemsGrid_Edit(sender As Object, e As DataGridCommandEventArgs) ' Set the EditItemIndex property to the index of the item clicked ' in the DataGrid control to enable editing for that item. Be sure ' to rebind the DateGrid to the data source to refresh the control. ItemsGrid.EditItemIndex = e.Item.ItemIndex BindGrid() End Sub Sub ItemsGrid_Cancel(sender As Object, e As DataGridCommandEventArgs) ' Set the EditItemIndex property to -1 to exit editing mode. ' Be sure to rebind the DateGrid to the data source to refresh ' the control. ItemsGrid.EditItemIndex = -1 BindGrid() End Sub Sub ItemsGrid_Update(sender As Object, e As DataGridCommandEventArgs) ' Retrieve the text boxes that contain the values to update. ' For bound columns, the edited value is stored in a TextBox. ' The TextBox is the 0th control in a cell's Controls collection. ' Each cell in the Cells collection of a DataGrid item represents ' a column in the DataGrid control. Dim qtyText As TextBox = CType(e.Item.Cells(3).Controls(0), TextBox) Dim priceText As TextBox = CType(e.Item.Cells(4).Controls(0), TextBox) ' Retrieve the updated values. Dim item As String = e.Item.Cells(2).Text Dim qty As String = qtyText.Text Dim price As String = priceText.Text Dim dr As DataRow ' With a database, use an update command to update the data. ' Because the data source in this example is an in-memory ' DataTable, delete the old row and replace it with a new one. ' Remove the old entry and clear the row filter. CartView.RowFilter = "Item='" & item & "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' *************************************************************** ' Insert data validation code here. Be sure to validate the ' values entered by the user before converting to the appropriate ' data types and updating the data source. ' *************************************************************** ' Add the new entry. dr = Cart.NewRow() dr(0) = Convert.ToInt32(qty) dr(1) = item ' If necessary, remove the '$' character from the price before ' converting it to a Double. If price.Chars(0) = "$" Then dr(2) = Convert.ToDouble(price.Substring(1)) Else dr(2) = Convert.ToDouble(price) End If Cart.Rows.Add(dr) ' Set the EditItemIndex property to -1 to exit editing mode. ' Be sure to rebind the DateGrid to the data source to refresh ' the control. ItemsGrid.EditItemIndex = -1 BindGrid() End Sub Sub BindGrid() ' Set the data source and bind to the Data Grid control. ItemsGrid.DataSource = CartView ItemsGrid.DataBind() End Sub Sub GetSource() ' For this example, the data source is a DataTable that is stored ' in session state. If the data source does not exist, create it; ' otherwise, load the data. If Session("ShoppingCart") Is Nothing Then ' Create the sample data. Dim dr As DataRow ' Define the columns of the table. Cart.Columns.Add(new DataColumn("Qty", GetType(Int32))) Cart.Columns.Add(new DataColumn("Item", GetType(String))) Cart.Columns.Add(new DataColumn("Price", GetType(Double))) ' Store the table in session state to persist its values ' between posts to the server. Session("ShoppingCart") = Cart ' Populate the DataTable with sample data. Dim i As Integer For i = 1 To 9 dr = Cart.NewRow() If (i Mod 2) <> 0 Then dr(0) = 2 Else dr(0) = 1 End If dr(1) = "Item " & i.ToString() dr(2) = (1.23 * (i + 1)) Cart.Rows.Add(dr) Next i Else ' Retrieve the sample data from session state. Cart = CType(Session("ShoppingCart"), DataTable) End If ' Create a DataView and specify the field to sort by. CartView = New DataView(Cart) CartView.Sort="Item" Return End Sub Sub ItemsGrid_Command(sender As Object, e As DataGridCommandEventArgs) Select (CType(e.CommandSource, LinkButton)).CommandName Case "Delete" DeleteItem(e) ' Add other cases here, if there are multiple ButtonColumns in ' the DataGrid control. Case Else ' Do nothing. End Select End Sub Sub DeleteItem(e As DataGridCommandEventArgs) ' e.Item is the table row where the command is raised. For bound ' columns, the value is stored in the Text property of a TableCell. Dim itemCell As TableCell = e.Item.Cells(2) Dim item As String = itemCell.Text ' Remove the selected item from the data source. CartView.RowFilter = "Item='" & item + "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' Rebind the data source to refresh the DataGrid control. BindGrid() End Sub </script> <body> <form runat="server"> <h3>DataGrid Editing Example</h3> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" OnEditCommand="ItemsGrid_Edit" OnCancelCommand="ItemsGrid_Cancel" OnUpdateCommand="ItemsGrid_Update" OnItemCommand="ItemsGrid_Command" AutoGenerateColumns="false" runat="server"> <HeaderStyle BackColor="#aaaadd"> </HeaderStyle> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" HeaderText="Edit item"> <ItemStyle Wrap="False"> </ItemStyle> <HeaderStyle Wrap="False"> </HeaderStyle> </asp:EditCommandColumn> <asp:ButtonColumn HeaderText="Delete item" ButtonType="LinkButton" Text="Delete" CommandName="Delete"/> <asp:BoundColumn HeaderText="Item" ReadOnly="True" DataField="Item"/> <asp:BoundColumn HeaderText="Quantity" DataField="Qty"/> <asp:BoundColumn HeaderText="Price" DataField="Price" DataFormatString="{0:c}"/> </Columns> </asp:DataGrid> </form> </body> </html>
<%@ Page Language="C#" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <html> <script runat="server"> // The Cart and CartView objects temporarily store the data source // for the DataGrid control while the page is being processed. DataTable Cart = new DataTable(); DataView CartView; void Page_Load(Object sender, EventArgs e) { // With a database, use an select query to retrieve the data. Because // the data source in this example is an in-memory DataTable, retrieve // the data from session state if it exists; otherwise, create the data // source. GetSource(); // The DataGrid control maintains state between posts to the server; // it only needs to be bound to a data source the first time the page // is loaded or when the data source is updated. if (!IsPostBack) { BindGrid(); } } void ItemsGrid_Edit(Object sender, DataGridCommandEventArgs e) { // Set the EditItemIndex property to the index of the item clicked // in the DataGrid control to enable editing for that item. Be sure // to rebind the DateGrid to the data source to refresh the control. ItemsGrid.EditItemIndex = e.Item.ItemIndex; BindGrid(); } void ItemsGrid_Cancel(Object sender, DataGridCommandEventArgs e) { // Set the EditItemIndex property to -1 to exit editing mode. // Be sure to rebind the DateGrid to the data source to refresh // the control. ItemsGrid.EditItemIndex = -1; BindGrid(); } void ItemsGrid_Update(Object sender, DataGridCommandEventArgs e) { // Retrieve the text boxes that contain the values to update. // For bound columns, the edited value is stored in a TextBox. // The TextBox is the 0th control in a cell's Controls collection. // Each cell in the Cells collection of a DataGrid item represents // a column in the DataGrid control. TextBox qtyText = (TextBox)e.Item.Cells[3].Controls[0]; TextBox priceText = (TextBox)e.Item.Cells[4].Controls[0]; // Retrieve the updated values. String item = e.Item.Cells[2].Text; String qty = qtyText.Text; String price = priceText.Text; DataRow dr; // With a database, use an update command to update the data. // Because the data source in this example is an in-memory // DataTable, delete the old row and replace it with a new one. // Remove the old entry and clear the row filter. CartView.RowFilter = "Item='" + item + "'"; if (CartView.Count > 0) { CartView.Delete(0); } CartView.RowFilter = ""; // *************************************************************** // Insert data validation code here. Be sure to validate the // values entered by the user before converting to the appropriate // data types and updating the data source. // *************************************************************** // Add the new entry. dr = Cart.NewRow(); dr[0] = Convert.ToInt32(qty); dr[1] = item; // If necessary, remove the '$' character from the price before // converting it to a Double. if(price[0] == '$') { dr[2] = Convert.ToDouble(price.Substring(1)); } else { dr[2] = Convert.ToDouble(price); } Cart.Rows.Add(dr); // Set the EditItemIndex property to -1 to exit editing mode. // Be sure to rebind the DateGrid to the data source to refresh // the control. ItemsGrid.EditItemIndex = -1; BindGrid(); } void BindGrid() { // Set the data source and bind to the Data Grid control. ItemsGrid.DataSource = CartView; ItemsGrid.DataBind(); } void GetSource() { // For this example, the data source is a DataTable that is stored // in session state. If the data source does not exist, create it; // otherwise, load the data. if (Session["ShoppingCart"] == null) { // Create the sample data. DataRow dr; // Define the columns of the table. Cart.Columns.Add(new DataColumn("Qty", typeof(Int32))); Cart.Columns.Add(new DataColumn("Item", typeof(String))); Cart.Columns.Add(new DataColumn("Price", typeof(Double))); // Store the table in session state to persist its values // between posts to the server. Session["ShoppingCart"] = Cart; // Populate the DataTable with sample data. for (int i = 1; i <= 9; i++) { dr = Cart.NewRow(); if (i % 2 != 0) { dr[0] = 2; } else { dr[0] = 1; } dr[1] = "Item " + i.ToString(); dr[2] = (1.23 * (i + 1)); Cart.Rows.Add(dr); } } else { // Retrieve the sample data from session state. Cart = (DataTable)Session["ShoppingCart"]; } // Create a DataView and specify the field to sort by. CartView = new DataView(Cart); CartView.Sort="Item"; return; } void ItemsGrid_Command(Object sender, DataGridCommandEventArgs e) { switch(((LinkButton)e.CommandSource).CommandName) { case "Delete": DeleteItem(e); break; // Add other cases here, if there are multiple ButtonColumns in // the DataGrid control. default: // Do nothing. break; } } void DeleteItem(DataGridCommandEventArgs e) { // e.Item is the table row where the command is raised. For bound // columns, the value is stored in the Text property of a TableCell. TableCell itemCell = e.Item.Cells[2]; string item = itemCell.Text; // Remove the selected item from the data source. CartView.RowFilter = "Item='" + item + "'"; if (CartView.Count > 0) { CartView.Delete(0); } CartView.RowFilter = ""; // Rebind the data source to refresh the DataGrid control. BindGrid(); } </script> <body> <form runat="server"> <h3>DataGrid Editing Example</h3> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" OnEditCommand="ItemsGrid_Edit" OnCancelCommand="ItemsGrid_Cancel" OnUpdateCommand="ItemsGrid_Update" OnItemCommand="ItemsGrid_Command" AutoGenerateColumns="false" runat="server"> <HeaderStyle BackColor="#aaaadd"> </HeaderStyle> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" HeaderText="Edit item"> <ItemStyle Wrap="False"> </ItemStyle> <HeaderStyle Wrap="False"> </HeaderStyle> </asp:EditCommandColumn> <asp:ButtonColumn HeaderText="Delete item" ButtonType="LinkButton" Text="Delete" CommandName="Delete"/> <asp:BoundColumn HeaderText="Item" ReadOnly="True" DataField="Item"/> <asp:BoundColumn HeaderText="Quantity" DataField="Qty"/> <asp:BoundColumn HeaderText="Price" DataField="Price" DataFormatString="{0:c}"/> </Columns> </asp:DataGrid> </form> </body> </html>
<%@ Page Language="VB" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <html> <script runat="server"> ' The Cart and CartView objects temporarily store the data source ' for the DataGrid control while the page is being processed. Dim Cart As DataTable = New DataTable() Dim CartView As DataView Sub Page_Load(sender As Object, e As EventArgs) ' With a database, use an select query to retrieve the data. ' Because the data source in this example is an in-memory ' DataTable, retrieve the data from session state if it exists; ' otherwise, create the data source. GetSource() ' The DataGrid control maintains state between posts to the server; ' it only needs to be bound to a data source the first time the ' page is loaded or when the data source is updated. If Not IsPostBack Then BindGrid() End If ' Manually register the event-handling methods. AddHandler ItemsGrid.EditCommand, AddressOf ItemsGrid_Edit AddHandler ItemsGrid.CancelCommand, AddressOf ItemsGrid_Cancel AddHandler ItemsGrid.UpdateCommand, AddressOf ItemsGrid_Update AddHandler ItemsGrid.ItemCommand, AddressOf ItemsGrid_Command End Sub Sub ItemsGrid_Edit(sender As Object, e As DataGridCommandEventArgs) ' Set the EditItemIndex property to the index of the item clicked ' in the DataGrid control to enable editing for that item. Be sure ' to rebind the DateGrid to the data source to refresh the control. ItemsGrid.EditItemIndex = e.Item.ItemIndex BindGrid() End Sub Sub ItemsGrid_Cancel(sender As Object, e As DataGridCommandEventArgs) ' Set the EditItemIndex property to -1 to exit editing mode. ' Be sure to rebind the DateGrid to the data source to refresh ' the control. ItemsGrid.EditItemIndex = -1 BindGrid() End Sub Sub ItemsGrid_Update(sender As Object, e As DataGridCommandEventArgs) ' Retrieve the text boxes that contain the values to update. ' For bound columns, the edited value is stored in a TextBox. ' The TextBox is the 0th control in a cell's Controls collection. ' Each cell in the Cells collection of a DataGrid item represents ' a column in the DataGrid control. Dim qtyText As TextBox = CType(e.Item.Cells(3).Controls(0), TextBox) Dim priceText As TextBox = CType(e.Item.Cells(4).Controls(0), TextBox) ' Retrieve the updated values. Dim item As String = e.Item.Cells(2).Text Dim qty As String = qtyText.Text Dim price As String = priceText.Text Dim dr As DataRow ' With a database, use an update command to update the data. ' Because the data source in this example is an in-memory ' DataTable, delete the old row and replace it with a new one. ' Remove the old entry and clear the row filter. CartView.RowFilter = "Item='" & item & "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' *************************************************************** ' Insert data validation code here. Make sure to validate the ' values entered by the user before converting to the appropriate ' data types and updating the data source. ' *************************************************************** ' Add the new entry. dr = Cart.NewRow() dr(0) = Convert.ToInt32(qty) dr(1) = item ' If necessary, remove the '$' character, from the price before ' converting it to a Double. If price.Chars(0) = "$" Then dr(2) = Convert.ToDouble(price.Substring(1)) Else dr(2) = Convert.ToDouble(price) End If Cart.Rows.Add(dr) ' Set the EditItemIndex property to -1 to exit editing mode. ' Be sure to rebind the DateGrid to the data source to refresh ' the control. ItemsGrid.EditItemIndex = -1 BindGrid() End Sub Sub BindGrid() ' Set the data source and bind to the Data Grid control. ItemsGrid.DataSource = CartView ItemsGrid.DataBind() End Sub Sub GetSource() ' For this example, the data source is a DataTable that is ' stored in session state. If the data source does not exist, ' create it; otherwise, load the data. If Session("ShoppingCart") Is Nothing Then ' Create the sample data. Dim dr As DataRow ' Define the columns of the table. Cart.Columns.Add(new DataColumn("Qty", GetType(Int32))) Cart.Columns.Add(new DataColumn("Item", GetType(String))) Cart.Columns.Add(new DataColumn("Price", GetType(Double))) ' Store the table in session state to persist its values ' between posts to the server. Session("ShoppingCart") = Cart ' Populate the DataTable with sample data. Dim i As Integer For i = 1 To 9 dr = Cart.NewRow() If (i Mod 2) <> 0 Then dr(0) = 2 Else dr(0) = 1 End If dr(1) = "Item " & i.ToString() dr(2) = (1.23 * (i + 1)) Cart.Rows.Add(dr) Next i Else ' Retrieve the sample data from session state. Cart = CType(Session("ShoppingCart"), DataTable) End If ' Create a DataView and specify the field to sort by. CartView = New DataView(Cart) CartView.Sort="Item" Return End Sub Sub ItemsGrid_Command(sender As Object, e As DataGridCommandEventArgs) Select (CType(e.CommandSource, LinkButton)).CommandName Case "Delete" DeleteItem(e) ' Add other cases here, if there are multiple ButtonColumns in ' the DataGrid control. Case Else ' Do nothing. End Select End Sub Sub DeleteItem(e As DataGridCommandEventArgs) ' e.Item is the table row where the command is raised. For bound ' columns, the value is stored in the Text property of a TableCell. Dim itemCell As TableCell = e.Item.Cells(2) Dim item As String = itemCell.Text ' Remove the selected item from the data source. CartView.RowFilter = "Item='" & item + "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' Rebind the data source to refresh the DataGrid control. BindGrid() End Sub </script> <body> <form runat="server"> <h3>DataGrid Editing Example</h3> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" AutoGenerateColumns="false" runat="server"> <HeaderStyle BackColor="#aaaadd"> </HeaderStyle> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" HeaderText="Edit item"> <ItemStyle Wrap="False"> </ItemStyle> <HeaderStyle Wrap="False"> </HeaderStyle> </asp:EditCommandColumn> <asp:ButtonColumn HeaderText="Delete item" ButtonType="LinkButton" Text="Delete" CommandName="Delete"/> <asp:BoundColumn HeaderText="Item" ReadOnly="True" DataField="Item"/> <asp:BoundColumn HeaderText="Quantity" DataField="Qty"/> <asp:BoundColumn HeaderText="Price" DataField="Price" DataFormatString="{0:c}"/> </Columns> </asp:DataGrid> </form> </body> </html>
<%@ Page Language="C#" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <html> <script runat="server"> // The Cart and CartView objects temporarily store the data source // for the DataGrid control while the page is being processed. DataTable Cart = new DataTable(); DataView CartView; void Page_Load(Object sender, EventArgs e) { // With a database, use an select query to retrieve the data. // Because the data source in this example is an in-memory // DataTable, retrieve the data from session state if it exists; // otherwise, create the data source. GetSource(); // The DataGrid control maintains state between posts to the server; // it only needs to be bound to a data source the first time the // page is loaded or when the data source is updated. if (!IsPostBack) { BindGrid(); } // Manually register the event-handling methods. ItemsGrid.EditCommand += new DataGridCommandEventHandler(this.ItemsGrid_Edit); ItemsGrid.CancelCommand += new DataGridCommandEventHandler(this.ItemsGrid_Cancel); ItemsGrid.UpdateCommand += new DataGridCommandEventHandler(this.ItemsGrid_Update); ItemsGrid.ItemCommand += new DataGridCommandEventHandler(this.ItemsGrid_Command); } void ItemsGrid_Edit(Object sender, DataGridCommandEventArgs e) { // Set the EditItemIndex property to the index of the item clicked // in the DataGrid control to enable editing for that item. Be sure // to rebind the DateGrid to the data source to refresh the control. ItemsGrid.EditItemIndex = e.Item.ItemIndex; BindGrid(); } void ItemsGrid_Cancel(Object sender, DataGridCommandEventArgs e) { // Set the EditItemIndex property to -1 to exit editing mode. // Be sure to rebind the DateGrid to the data source to refresh // the control. ItemsGrid.EditItemIndex = -1; BindGrid(); } void ItemsGrid_Update(Object sender, DataGridCommandEventArgs e) { // Retrieve the text boxes that contain the values to update. // For bound columns, the edited value is stored in a TextBox. // The TextBox is the 0th control in a cell's Controls collection. // Each cell in the Cells collection of a DataGrid item represents // a column in the DataGrid control. TextBox qtyText = (TextBox)e.Item.Cells[3].Controls[0]; TextBox priceText = (TextBox)e.Item.Cells[4].Controls[0]; // Retrieve the updated values. String item = e.Item.Cells[2].Text; String qty = qtyText.Text; String price = priceText.Text; DataRow dr; // With a database, use an update command to update the data. // Because the data source in this example is an in-memory // DataTable, delete the old row and replace it with a new one. // Remove the old entry and clear the row filter. CartView.RowFilter = "Item='" + item + "'"; if (CartView.Count > 0) { CartView.Delete(0); } CartView.RowFilter = ""; // *************************************************************** // Insert data validation code here. Make sure to validate the // values entered by the user before converting to the appropriate // data types and updating the data source. // *************************************************************** // Add the new entry. dr = Cart.NewRow(); dr[0] = Convert.ToInt32(qty); dr[1] = item; // If necessary, remove the '$' character, from the price before // converting it to a Double. if(price[0] == '$') { dr[2] = Convert.ToDouble(price.Substring(1)); } else { dr[2] = Convert.ToDouble(price); } Cart.Rows.Add(dr); // Set the EditItemIndex property to -1 to exit editing mode. // Be sure to rebind the DateGrid to the data source to refresh // the control. ItemsGrid.EditItemIndex = -1; BindGrid(); } void BindGrid() { // Set the data source and bind to the Data Grid control. ItemsGrid.DataSource = CartView; ItemsGrid.DataBind(); } void GetSource() { // For this example, the data source is a DataTable that is // stored in session state. If the data source does not exist, // create it; otherwise, load the data. if (Session["ShoppingCart"] == null) { // Create the sample data. DataRow dr; // Define the columns of the table. Cart.Columns.Add(new DataColumn("Qty", typeof(Int32))); Cart.Columns.Add(new DataColumn("Item", typeof(String))); Cart.Columns.Add(new DataColumn("Price", typeof(Double))); // Store the table in session state to persist its values // between posts to the server. Session["ShoppingCart"] = Cart; // Populate the DataTable with sample data. for (int i = 1; i <= 9; i++) { dr = Cart.NewRow(); if (i % 2 != 0) { dr[0] = 2; } else { dr[0] = 1; } dr[1] = "Item " + i.ToString(); dr[2] = (1.23 * (i + 1)); Cart.Rows.Add(dr); } } else { // Retrieve the sample data from session state. Cart = (DataTable)Session["ShoppingCart"]; } // Create a DataView and specify the field to sort by. CartView = new DataView(Cart); CartView.Sort="Item"; return; } void ItemsGrid_Command(Object sender, DataGridCommandEventArgs e) { switch(((LinkButton)e.CommandSource).CommandName) { case "Delete": DeleteItem(e); break; // Add other cases here, if there are multiple ButtonColumns in // the DataGrid control. default: // Do nothing. break; } } void DeleteItem(DataGridCommandEventArgs e) { // e.Item is the table row where the command is raised. For bound // columns, the value is stored in the Text property of a TableCell. TableCell itemCell = e.Item.Cells[2]; string item = itemCell.Text; // Remove the selected item from the data source. CartView.RowFilter = "Item='" + item + "'"; if (CartView.Count > 0) { CartView.Delete(0); } CartView.RowFilter = ""; // Rebind the data source to refresh the DataGrid control. BindGrid(); } </script> <body> <form runat="server"> <h3>DataGrid Editing Example</h3> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" OnEditCommand="ItemsGrid_Edit" OnCancelCommand="ItemsGrid_Cancel" OnUpdateCommand="ItemsGrid_Update" OnItemCommand="ItemsGrid_Command" AutoGenerateColumns="false" runat="server"> <HeaderStyle BackColor="#aaaadd"> </HeaderStyle> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" HeaderText="Edit item"> <ItemStyle Wrap="False"> </ItemStyle> <HeaderStyle Wrap="False"> </HeaderStyle> </asp:EditCommandColumn> <asp:ButtonColumn HeaderText="Delete item" ButtonType="LinkButton" Text="Delete" CommandName="Delete"/> <asp:BoundColumn HeaderText="Item" ReadOnly="True" DataField="Item"/> <asp:BoundColumn HeaderText="Quantity" DataField="Qty"/> <asp:BoundColumn HeaderText="Price" DataField="Price" DataFormatString="{0:c}"/> </Columns> </asp:DataGrid> </form> </body> </html>
.NET Framework のセキュリティ継承階層 System.Object
System.EventArgs
System.Web.UI.WebControls.CommandEventArgs
System.Web.UI.WebControls.DataGridCommandEventArgs
System.EventArgs
System.Web.UI.WebControls.CommandEventArgs
System.Web.UI.WebControls.DataGridCommandEventArgs
スレッド セーフプラットフォームWindows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。
バージョン情報参照- DataGridCommandEventArgs クラスのページへのリンク
